i just got a jegs book and i saw a dual overhead tunnel ram intake and i was woundering what effects it wold have on my 351M. also i woundering what kind of crabs i should use. i need help

 

Asked and answered.

You got all the info you need in the prior thread:

https://www.ford-trucks.com/forums/1...l#post10623408

"dual overhead tunnel ram".???
Like this:

JEGS High Performance - 925-1993K

The effect on your 351m would be that it wouldn't run. I'm sure there are worse choices for your engine, but I can't think of them.

Crabs?

There is NOTHING you can do to a stock 351m that involves this kind of equipment. There is NOTHING you can do to a stock 351m that will get you more than MAYBE 180-200 hp.

You have been given lots of info on this engine. You should read it.

 

tunnel ram is for serious top end work with the engine needing to be built to a massive upper level to actually need the flow of a big tunnel ram with a cuple of carbs on it. that manifold may looks sexy and tough, but would be a massive waste of money and effort on a 351m. start at the right area first and look at turning it into a 400 or even a 434. decent ignition, heads, extractors and cam and fit a RPM air gap (with a bit of mucking around) and you would have a serious weapon. Crabs(?) I think you mean carbs, there seems to be a lot of opinions on those but have a search on this forum as there is a fair bit of knowledge. Best guideline is don't over carb. good rebuild only requires a 600CFM 4bbl and anything upto 750cfm+ is personal requirements. Propane likes bigger carbs, and Wyoming4x4 reckons approx 850cfm are the go for altitude work. Start at the start you really have a lot of work ahead of you before should be thinking of tunnel ram. Remember there are some serious minded people on the forum. Not everyone always knows what they are talking about, but you have asked this question before and had it answered by the look of it. If people don't believe you are listening to the advice given, they may stop helping you. Good luck

 

well like mentioned tunnel ram is whole different problem. cool but lots of tuning. Also getting carbs to work and a very tunalble carb and not cheap carb either. I like hi end carbs and they are not cheap! my carbs cost as much as some people spend on overhauls. also the cheaper the carb more the problems. But i also know what it does to a engine if really nice carb if used. Big fan of quick fuels bang for the buck but not a $400 dollar carb either. need a flow bench to epoxy up tunnel ram at ports to work properly. This is common practice with tunnel rams on the epoxy work. they can work but not for the beginner either, flow bench!! good luck!

 

Yea, the OP should get that tunnel ram and pour some epoxy down that baby! That 351M will be spinning to the moon and fogging all four tires on that Bronco in no time flat!

 

I guess I won't get into oil lubrication and high rpms with clevelands or any engine. Also cylinder wall issues or hrd blok the cylinders some to keep cylinders from moving around. It can be done but definelty not a simple process. Yea stuff some epoxy down the intake runners of tunnel ram!

 

well thanks. now as far as im thinking about my intake i may just go with a high rise aluminum intake with a holley 650cfm double pumper carb and see where it goes from there.

 

If only turning around 6000 mx rpm I would suggest the air gap. have run in different applications and seems to be a good all around intake. Or the weiand intake dual plane. I run the weiand also in big blocks and good intake but need to step up on the performance to appreciate the intake. If just a regular engine edelbrock performer rpm good intake. If running some rpms need to really get your bearing clearances correct and don't assume anything. IF you get serious drop a message and will help out but if just bench racing I guess we are done. I do like it when old iron runs well. catch you later and good luck. Timmeyer website is a great place to get some info on these engines and need to read as much as possible to really understand what you really want!

 

You do realize the OP is 16, and this is a transplanted, probably stock, 351m in grandpa's old Bronco? 6000 rpm? Stock the peak HP is at 3400-3600 rpm--how will a high rise and 650DP carb work on that? Waste of money. OP has been given the TMI site and others, but either won't read it or can't understand it. His money to burn. Good luck.

 

I didn't know anything at 16,and the internet wasn't available. I thought I new stuff, HA! Had to read books and trial and error. Eventually went to School of automotive machinist, Judson. Kids have it to easy these days. But if I can help a litlin out and keep old iron alive one ford at a time maybe its worth it. My first blown engine was 351M stock mudholing in the brazos river in texas. glad those days are over.